Type-writing machine



3 Sheets-Sheet 1.

(No Model.) Y

M. H. DBVIENT.

TYPE WRITXNG MACHINE. l NQ. 301,486. Patented .my 8, 1884.

' 3 Sheetsf-Sheet 2.

(No Model.) v

M. E. DEMENT. TYPE WRITING MACHINE. No. 301,486. I Patented July 8, 18811:l

(No Model.) 3 Sheets-Sheet 3.

H. DBMENT.

TYPE WRITING MAGHINE.

No. 801,486. l j Patented July 8, 1884.

u ...1.1 I' l i l l in the claims.

PATENT trice.

MERRIIT H. DEMENT, OF CHICAGO, ILLINOIS.

TYPE-WRITING MACHINE.

SECIFICATION forming part of Letters Patent No. 301,486, dated July 8, 1884.v

Applicationvled March 17, 1883A. (No model.)

.To alli wirr/'nt it may concern:

Be it known that l, MERRITT H. DEMENT, ofthe city of Chicago, in the county of Cook and State of Illinois, haveinvented anew and useful Improvement in Type Writing Machines, which improvement is fully set forth in the following speciiication, reference being had to the accompanying drawings, which are made a part hereof.

My invention relates to the art of printing; and it consists of a new and improved typewriting and printing machine, by means of which words, figures, symbols, &c., may be printed or indented upon orin strips or sheets of paper or other suitable material, as hereinafter described, and particularly pointed out In a former application I have applied certain cam devices toamachine combining a revolving cylinder with a series of sliding rods. I desire non`r to use somewhat similar cam devices, in combination with a revolving cylinder and a series of pivoted tilting or tipping bars, and to make certain other useful improvements, which are hereinafter described and shown, whereby the machi'neis made easier to operate, less liable to get out of order, more accurate and certain in operation, and less expensive to manufacture.

In the annexed drawings, Figure l is a central longitudinal vertical section ol' my improved machine, the shaft, type-ring, and pulley being shown in elevation. Fig. 2 is a' plan View. Fig. 3 is a transverse vertical section taken on line x a, Fig. l. Fig. 4 is a plan view with cylinder and type-ring removed, showing cams and arrangement ot' key-bars, and toothed bar for holding key-bars against the cylinder while operating. Figs. 5, 6, 7, and S are detail views ofthe cams and paperguide and support therefor; Fig. 9 is a central vertical section of a modification of my machine, showing type-ring upon a separate shaft, and tilting bars in one piece, instead of being jointed. Fig. lO is a sectional view thereof on line y y of Fig. 9, the type-ring and upper gear-wheel being shown in outline.

Fig. ll is a plan vieW thereof with type-ring and gear-wheel removed, j' representing a stop plate, againstfwhich the spring X presses the bars M. Fig. 12 isa central vertical section thereof, showing modified arrangement of key-bars and toothed bar. Fig. 13 is a longitudinal vertical section, substantially the same as Fig. 9, except showing plain backingring g, instead of a type-ring, the type being shown upon the tilting bars. b b represent gear-wheels. Fig. la is a sectionalview showing manner of attachment of backing-plate and paper-guide d, of which Figs. 16, 17, and 1S are detail views. Fig. 15 are detail views of tilting bars with type attached.

In constructing the improved machine, the cylinder F is placed upon ashaft, which rest-s in bearings or hangers E E, secured to a baseplateH, which should be of cast-iron. Power is applied by means of apulley, D, at the end of the shaft G. Atype wheel or ring, C, somewhat smaller in diameter than the cylinder, with the letters of the alphabet, capitals, and small letters, figures, punctuation-marks, die. set radially therein, is placed on the shaft Gr and next to the endof the cylinder. A series oflongitudinal grooves are cut in the cylinder, in which are placed a series of bars, A, corresponding in number with the type in the wheel or ring, and pivoted at or near their centers, and cut sloping at the inner end, so that that end may be depressed in the groove, and the other end thereby lifted or tipped up. rlhese bars are of different lengths, being placed evenly at one end and the other or inner end of each bar reaching to a particular key in the 'key-board. The bars are held in place by any suitable device, the one shown being the plate Q, secured to the cylinder by a screw, each end resting upon a bar at or near its center, so that one plate secures two bars. In the groove underneath each bar is placed a spring to hold it in position when not printing, and to throw the other end or hammer B from the paper after printing.

In the grooves at the end of the cylinder at which the type-ring is placed are a series oi short bars or hammers, B, of uniform length, held in position by a hand, T, which encircles the cylinder at about their centers. These hammers are loosely connected with the longer bars by means ot tongues on onefitting in slots in the other. These hammers B are so arranged that they protrude a short distance from the IOO 'complishing this result.

end of the cylinder and overhang the typeone for each corresponding key-bar. The end ring C, each hammer covering and operating upon'a particular type. B and A represent outlinesof bar and hammer while printing. In a full-sized machine the ends of the hammers will protrude much less proportionately than as shown in the drawings, one-eighth of an inch being sufiieicnt, and in the form of the machine shown in Figs. 1 to 8 the paper strip as it is fed to and discharged from the printing-point should be held out of the wayv of the hammer ends as they revolve. This may be done in avariety of ways-for instance, by a guard at each side of the lmachine or slightly twisting the strip. I do not in this application show or claim any device for ac- In the form of the machine shown in Fig. 9 the paper strip will noty be in the way of the hammers.

Upon the support I, secured to the baseplate H, areiized a grooved plate, WV, through which the paper strip to be printed upon is run, and two cams, O and V, the iirst cam,V, operating to bring the bars in position to pass upon the second cam, O, and the second operating to press the bars upon the paper strip'. These cams protrude or hang out from their support into the space between the protruding hammers and the type-ring, the' hammers, when at rest as the cylinder revolves, passing beneath the cams, and when operated upon by the keys M passing above the cams, and between them and the papergroove NV, which is next to the type-ring.

Z represents the paper strip passing through the plate W. The key-board is placed at the side of the cylinder, and consists of a series of bars, M, pivoted on a rod resting in supports S S, and corresponding in number with the longitudinal bars in the cylinder, each with a lettered ringer-plate on one end, and upon the other end, which reaches under the cylinder, a cam, h. By pressing upon the iinger end ofthe bar the cam 7L is brought against the cylinder and in the line of the cam-pin R upon the corresponding cylinder-bar, and as the cylinder revolves the cam-pin R will strike the cam h on the key-bar and be pressed inwardly by it.

To hold the cams on the key-bars rigidly against the cylinder while the cam-pins are pressing against them, I provide a mechanism consisting of a bar, N, placed under and parallel with the cylinder and back of the keybars, resting on suitable supports and capable of a slight movement endwise by means of screws .moving in slots. This movement is caused by a cam, e, fixed on the surface of the cylinder, which at each revolution of the wheel operates upon a cam, P, on the arm Y, at the end of the bar, causing the movement endwise, the bar being returned to its resting position by Ia spring, a, the slots preventing the spring from pushing the bar too far. The endwise movementsho'uld be about one-eighth of an inch. This bar is provided with a series of teeth,

of each key-bar, whenf the; bar? is at rest, lies under a tooth in this bar; but'as the cylinder revolves, and the cam e strikes the end of the bar N, it moves the tooth from over the end of the key-bar, and brings over the end of the key-bar, instead, the open space in the toothed bar between the teeth, so that, if a key-barbe pressed upon at that instant, its end will pass up' through the opening between the teeth in the bar, and the bar being immediately returned -to its resting position the tooth will pass under the end vof the key-bar and hold the key-bar up in position until the next revolution'of the cylinder, when the cam e will fall again, through the action of the springX,

which is placed under the finger end ofthe key-bar, to its resting position. -The cam e on the cylinder is so placed-that it operates on the toothed bar Nimmediately before the first pivoted bar in the cylinder shall, in therevolution of the cylinder, reach the eam'h onr the key-bars, so that the rst key of the key-board may be depressed in time to print in that revolution. It willbe seen thatif but thev cam O werewused, and the key should not act to fully depress the bar, the bar Imight strike broadside' the point of the'cam O and stop the cylinder or break the bar or cam. This difficulty is prevented' by cutting away the bar at the point L' for'a sixteenth 'ofanV inch,or thereabout, from the end, so as' to form a thin cam on the inner edge, and placing the ca'mV immediately before and at the side of the cam O, the two cams `L and V being madey sharp, so that a very slight depression of thel barswill cause the cam L on 'the bar to catch above the cam V, which cam shouldfbe provided'with vsufficient rise to 'lift the bar to the proper height to b e in position for the cam O.

The operation is as follows: 'By depressing a key as the cylinder revolves, the cam`R on IIO the inner end of a bar isdepressed in its groove.

In turn the joint U is lifted, and the end of the bar which protrndes from the cylinder is depressed nearer the type-wheel. The cam L upon the end of the bar strikes the cam V, which lifts the bar so that it will lstrike 'and ride upon the cam O, and as it rides thereon will be further depressed until it strikes the paper and raises the paper to the type.

,At this point the second cam, 0, is formed with a sharp bevel, and as the cylinder revolves and the bar has pressed the paperup to the type, the bar, coming in contactwith this sharp bevel of the cam O, is given a more direct stroke upward and drives the paper on the type with a direct 'hammer -like blow. The printing is thus accomplished.

The object of giving the sharp bevel to the upper part of the second cam, or, moreproperly speaking, giving very little rise tothe iirst part of the cam, vis to prevent the bar from catching the paper too soon, and thus probably dragging it too far.

To give each letter, as it is printed upon the strip, its proper space according to its Width,`the bars at the point K, where `they pass over the cam O, are made offdifferent widths. It will be seen that a wide bar will be longer in passing the cam than a narrow one. It will also be seen that as the bar presses the paper on the type, and the type is embedded therein, `the paper strip will be pulled as long as the type is thus embedded, so that a wide bar will pull the paper farther than a narrow bar; This feature ofthe bars I have described i-n a former application, and make no claim for here.

The nia-chine may be differently constructed by placing the type-ring upon aseparate shaft,

as in Fig. 9, in which case the pivoted bars are made in one piece, the printing-cams being placed outside of the bar ends,which protrude from the cylinder, the `paper-groove being above the cams and between them and the typering. The action in this case is that by the operation of the lrcy the inner end of the bar is depressed, and the end which protrudes from the cylinder is lifted, so-that it strikes the cam, and is still further lifted until it strikes the paper and prints, in substantially in the same manner as hereinbefore described; or the type-ring may be dispensed with and a plain ring used instead, as in Fig. 13,' which may be concentric or on a separate shaft. In this case the type are cut or set in the bars on either their inner or outer edges, as the case may be, and the indentation is made by the hars passing over the cam and pressing the paper against the plain ring, which offers the necessary resistance to permit the type to be embedded in the paper. Two or more types may be cut or set in each bar, in which case the plain ring should be made to shift on its shaft, so as to cover the diii'erent types as they are to be printed from.

A still simpler inode of constructing the machine is to have aiixed plate, as in Fig. 14, which shall serve as a back to the paper strip, instead of having a plain ring or type-ring. In this form of the machine the type are cut or set in the bars', either on their inner or outer sides or edges, as the case maybe. The plate may be secured to the base-plate, the papergroove being cut in` its face. Immediately under it, and still outside of the bars, the cams O and V are placed. The operation in this case is that the keys throw the protruding ends ofthe bars outward, so that they strike the cams, and are pressed still farther outward, and print, in substantially the saine way as heretofore described. In this form the type are out on the outer edge of the bars; but the plate and cam may be placed inside of the bar ends, and the bars made double and jointed, as hereinbeiore described, the type being cut on the :inner sides or edges of the bars, and substantially the same results be accomplished.

,To make the spaces between the words without indenting the face of the paper where the type-ring is used, I place therein a blank plate in place of a type, and upon the inner or outer edge, as the case may be, of the corresponding bar are placed pins or points, the operation being that when the bar presses the paper upon the blank pin or type in the ring the pin or point on the bar will serve to indent the paper and hold and pull it the same as if theindentation had been made on the other side of the paper by the type. The same result may be accomplished where a plain ring is used, and the type are cut or set in bars by placing upon the ring, pins, or points, immediately under vthe bar whichconnects with the space-key, so

that when the space-key shall have operated that bar shall press the paper against the pin or point on the plain ring and the paper be pulled the same as if a type-indentation had been made on the other side of the paper. Vhere the plate is used instead of the ring, it will be seen that the indentation cannot be made in the back of the strip. In such case the inner or outer edge of the bar, as the case may be, should be slightly milled or roughened. The milling should not be made so as to cut deep] yinto the paper, because the spacebar can be made wider, if necessary, so that a very slight hold will pull it the required distance.

The pivoted tilting or tipping bars in a cylindenmachine are superior to other kinds of bars, because they occasion less friction, and are free from liability to get out of order by the breaking of cam-pins, as the action upon them is very gentle, and they do notl require much power to operate. Another and more important advantage is the fact that the keys may be placed very close together, each not necessarily occupying over oneeighth of an inch. This is because the operation of the key is simply to press the bar inwardly, and there need be but little cam-surface, whereas in the case of sliding rods the key-bar has sufficient cam-surface to slide the rod the distance that itis required to protrude from the cylinderviz., about three-eighths of an inch. By the use of the pivoted vbars a key-board consisting ICO IIO

of sixty-four keys may be compressed into a f space of eight inches, making it convenient and easy for the operator to reach any desired number of keys required to be operated at once, whereas a key-board on a sliding-rod machine, consisting ot' sixty-four keys, if each oepied three-eighths of an inch,would be twentyfour inches long. A further advantage consists in the fact that the cylinder is proportionately shorter-that is, in my improved machine it need be but eight inches long, while in the other it may be twentyfour inches long. If the bars are pivoted at their centers, there will be as much movement at the protruding end as there is at the end depressed by thekeybar. To save friction, the longitudinal bars may be pivoted back of their centers or toward gitudinal tilting bars and means for actuating the bars, substantially as shown and described.

3. The combination of a cylinder with longitudinal tilting bars and the cam O, substantially as shown and described.

4. The combination of a revolving cylinder, with its pivoted tilting or tipping bars and type, With mechanism for actuating the bars and pressing them upon the paper or material to be printed upon or indented, substantially as shown and described. i Y 5. The combination of a revolving cylinder and bars with type out or set therein, With a plain backing-ring, and mechanism for pressing the bars against the paper or material to be printed upon or indented, substantially as shown and described.

G. The combination of a revolving cylinder with double or jointed pivoted or tipping bars, and a cam by means of which the bars are pressed inwardly, substantially as shown and described.

O 7. The combination of a revolving cylinder and a series of pivoted or tipping bars having cam-surfaces L, with the cam V, substantially as and for the purposes shown and described.

MERRITT H. DEMENT.

Vitnesses: v

M. E. HIBBEN, C. C. GRoNrsn. 

